Gaya APA

PANGGABEAN, M, P. (2010). Is there bull and bear markets in the Indonesia stock exchange? . Surabaya: Fak. Ekonomi Prodi Akuntansi Univ. Kristen Petra.

Gaya MLA

PANGGABEAN, Martin, P.H.. "Is there bull and bear markets in the Indonesia stock exchange?". Surabaya: Fak. Ekonomi Prodi Akuntansi Univ. Kristen Petra, 2010. Artikel.